伪随机二相码码元选取及信号处理算法研究

A study on the code element choosing principles for pseudo-random biphase-coded signals and the signal processing algorithm

相位编码信号是低截获概率雷达信号的主要形式之一,能够提高雷达的生存能力。本文阐述了随机二相码的选取原则,在通过计算机仿真选取了适合条件的一组码元的基础上,对数字正交、频域脉冲压缩、旁瓣抑制滤波器设计等信号处理算法及静止和运动目标情况下旁瓣的抑制效果进行了研究和仿真。仿真结果证明了文中分析的正确性。

As the major type of signals of LPI radars, the phase-coded signals can enhance the radar survivability. In this paper, not only the code-choosing principles for biphase-coded signal are presented, but also the processing methods of DDC, pulse compression in frequency domain, design of sidelobe suppression filter （SSF） and the sidelobe suppression effects for static and moving targets are studied and simulated based on a group of codes suitable for the principles. The simulation results prove that the analysis is correct.